User's Manual - Cornell Lab of Ornithology - Cornell University

Chapter 1: Getting StartedCursor tagsand grab tagsThe active cursorFigure 1.9 shows the window as it appears right after you turn on cursors. Atthe point where you last clicked in the waveform pane, two cursors (nonblinkingvertical lines) appear superimposed on each other. The position ofeach cursor in time is indicated by a small horizontally pointing arrowheadcalled a cursor tag, just below the time axis. Cursors and cursor tags alsoappear in the spectrogram and spectrum panes. In those two panes, cursorsappear along both the horizontal and vertical axes. A cursor can be placedbeyond the end of the visible part of an axis, and so not be shown on thescreen. When this happens, a grab tag appears at one end of the axis, pointingin the direction of the off-screen cursor.At any time, one cursor in each direction (horizontal and vertical) in the activepane is the active cursor; its tag is filled (black), whereas all others are open.Each active cursor can be moved using the arrow keys on the keyboard. Youselect which cursor is active in each direction by clicking on one of the tags.Try using the horizontal arrow keys to move the active cursor in thewaveform pane. You can also move a cursor by dragging its tag with themouse.The cursor value is displayed along the axis immediately below or next to thecursor’s tag. As you move a cursor, the cursor value is updated continuouslyto show the cursor’s exact position in whatever units are used to label the axis(e.g., seconds or milliseconds on the time axis).The area between the cursors in the active pane is the current selection andappears highlighted. While cursors are turned on, you can select part of adisplay either by moving the cursors directly (using the arrow keys or themouse) or you can hold down the option key while dragging the mouse acrossthe region to be selected. Holding down the option key causes the cursors to“snap” to the mouse position and to follow the mouse pointer as you drag.22 Canary 1.2 User’s Manual